Erwin walter



` i. WALTER. GUIDE PLATE FOR THE BOBBINS 0F BRAIDING MACHINES.

APPLICATION FILED DEC. 3 1. |918. 1,315,265. Patentedsept. 9,1919.

tuuTED N sTATEs PATENT oEEioE.

ERWIN WALTER, OF MELLINGEN, AARGAU, SWITZERLAND, ASSIGN'OR T0 THE FIRM0F ARGOVIA A.Gr., OF MELLINGEN, AARGAU, SWITZERLAND.

GUIDE-PLATE FOR THE BOBBINS OF RAIDINGr-MAGI-IINES.

Specification of Letters Patent.

Patented. sept. 9, 191e.

Application led December 31, 1918. Serial No. 269,042.

To all 'whom t may concern:

Be it known that 1, ERWIN WALTER, a citizen of the Republic ofSwitzerland, residing at Mellingen, Aargau, Switzerland, have inventedcertain new and useful Improvements in Guide-Plates for the Bobbins ofBraiding-Machines; and I do hereby declare the following to be a clear,ull, and exact description of the invention, such as will enable othersskilled in theart to which it appertains to make and use the same,reference being had to the accompanying drawing, and to letters orfigures of reference marked thereon, which form a part of thisspecification.

The present invention relates to improvements in guide plates for thebobbins of braiding machines provided with shuttles traveling in groovesof the guide late. Ac cording to the present invention t e grooves .ofthe guide plate comprise two stages, the

one of which is designed in the conventional manner and Jforming agroove provided with an outer wall having the shape of an arc of acircle serves for receiving a shuttle having also arc-shaped walls,while the other stage serves for receiving a projection 'of -theshuttle.` This projection acts as a support for the shuttle when thebobbin passes from a groove into fthe succeeding one and preventsthereby any disturbing rotation of'the shuttle, and consequently of thebobbin, about the vertical axis passing through the center of gravity ofthe bobbin.

The invention will now benmore particularly described with vreference tothe accompanying drawing illustrating by way of example a constructionaccording to the invention. In this drawing:

Figure 1 is a vertical cross-section through a guide plate onthe lineI-Iof Fig. 2, illustrating adjacent parts of the braiding machine inelevation.

Fig. 2 isa horizontal section on the line II-II of Fig. 1 lookingdownward in the direction of the arrows;

Fig. 3 illustrates a top view of a portion of the guide plate havinggrooves comprising two stages and a section `through a shuttle;

Fig. 1 shows partly a front view and partly a section on theline IVMIVofFig. 3 of a bobbin and its shuttle and of. the ad-i jacent parte ofthe braiding machine;

Fig. 5 is a bottom view and j Flg. 6 1s a side view of the shuttle; Fig.7 isa view correspondmg substantially to Fig. 3, but illustrating thebobbin in another position, and

Fig. 8 is a section on theline VIII-VIII of Fig. 7.

Referring to the drawings, 1 denotes the guide plate of the braidingmachine having two circular grooves 2, 2. Each of the grooves 2, 2comprises two stages. The lower stage 3 of these grooves is of convenvtional design and has an outer wall hav- `approximately equal to theheight of the shuttle 6.

The outer wall 10 of the upper stage 5 has also the shape of an arc of acircle up to a point 11 where it passes into a straight wall portion 12,while the outer wall 1 of the lower stage 3 is of circular shape up tothe point 17, where the groove ceases. The line of the wall portion 12forms at the point 17 a tangent touching the arc of a circle of the wall11, and the point 11 is the point of intersection of this tangent withthe line of the outer wall 10.

The wall `12 constitutes the side face of a guide member 13 of angularshape. The arrangement is such thatn each of the two adjacent grooves 2,2 is provided at its end with such a straight wall 12. The guide member13 is preferably stamped out of a metallic plate, and it is insertedinto a corresponding milled notch provided in the guide plate 1. Thethickness of the metallic plate corresponds at least approximately tothe height ofthe projection 7.`

The inner walls of the grooves 2, 2 pass at thepoints of transition of agroove into the neXt one overinto straight walls 14. 18 (Figs. 1, 2)designates drivers tree to rotate on a stud or bolt 19 rigidly securedin the guideplate 1. The greater portion of the periphery of each driver18 hasteeth and all the drivers are in mutual engage-f ment..

The. remaining portion 'of each driver 18 has notches 22 which serve toreceive and advance the spindles 20 for the bobbins 21. One of thedrivers, for instance A in Fig. 2, is positively driven from the spurwheel 23 of the main machine drive by means of the intermediate gears 24and 25, the latter being fast on the shaft of the wheel A, and drivesthe two adjacent meshing drivers 18, Which. actuate in turn the drivers18 meshing therewith, and so on.

The described construction works as follows:

When a spindle 2.0 passes with. its bobbin 2-1 from. one driver 18 intothe next one, c.,

at the point where the groove ceases andV the. shuttle is no longersupported by walls (chiefiy the outer Walls) of the groove, the

.bobbin is, subjected to a kinetic energy due toa rotation. about thecenter of the driver or groove respectively.. Owing to. this kineticenergy to which the. bobbin is subj,ectyed.thel latter, andV thereforealso the shuttle, has the tendency-in consequence of its; inertia.tending to keep. up said rotary ymovement-to, rotate further about itsverv tical axis passing through the center of .gravity of said bobbin inthe direction in which it would be causedtov rotate by the wallof` thecircular groove when such a groove would be present.l At the same time,the. bobbin: has'l at,v theV point where the groove ceases the. tendencyto. wander .farther in: the direction of the tangent touching the circledescribed by the vertical axis, passing through the center of gravity ofthebobbin. When the guide plate admits a. rotation of the, bobbin aboutthe vertical axis passing through its center of gravity,

Vsuch, a rotation prevents the. longitudinal axis` of theY shuttle from.coinciding with the longitudinal axis of the continuation of thegrooves. and causes on the contraryv the front pointed end oftheshuttle. to strike violently against, the oirter wall of the nextgroove. As a rule, thev shuttle rebounds. from said wall. and strikesagainst, thea inner wall of thegroove.. Owingy to this continuedbounding, causing a. violent throwing about of the shuttle, the. walls.of' the; groove are. not

When thev bobbin, and consequentlyv the shuttle,..l`11as beenmoved tromthe position illustrated 1n Fig, 3, in which-'the shuttle wanders 1nthe:` lower stage, of vthe groove,

while the projection. Z shdeswithsmall friction along the outer wall ofthe upper stage 5 of the groove, into the position shown in Fig. 7, thebobbin starts to travel into the succeeding groove. The straight wall 8-of the projection 7 comes at this moment in contact with the straightwall 12 of the guide member 13 of angular shape. The shuttle guided atthis moment also b y the straight walls 14 is then supported on bothsides, so that it is prevented from rotating in the sense abovementioned, as the kinetic energy having` the tendency to bring about arotary movement is taken up by the straight wall 12: of the guide member13 and destroyed, so that the bobbin travels over a longer distance ina. straight direction in the direction of the tangent touching the outerwall 4 at the point 17, the projectionv of its shuttle being guided bythe wall 12. coinciding with said tangent. Then the bobbin. has beenmoved past the point 17, where the wall 12 ceases, the shuttle is guidedby the wall 9 of the projection 7 along the straight wall 14:; the frontpointedv end of the shuttle has then been moved past point 16 of thenext grofwe and the shuttle is guided into 4the next groove without itspointed front end striking against the wall of the last mentionedgroove. j

Owing to the insertion. of the guide member 13 into.y the guide plate,the shape of an arc. of a circle may beY given to the outer wallsk ofthe two stages off the grooves resulting in a considerable advantage, assuch a groove canbe easily milled, which is not the case with regardtothe groove of conventional shape having a straight. portion of thepoi-nt where the bobbin wanders from one driver tov the next one..

that I claim now as my invention is.:

1.` In a braiding machine, in combination with a guide plate providedwith grooves, of bobbin spindles, shuttles connected to said spindlesand eachprovidedwitha projection, and. means` causing said bobbinspindles. to travel in the grooves of the guide plate, the grooves ofsaid guide plate comprising twoy stages, the one of which lmving arcshaped lateral walls serves for receiving the shuttles having also, arcshapedI walls, while the other stage servesfor receiving the projection`provided onl the shuttle and acting as a support for the latter whenthe bobbin. spindle passes from one groove into the succeeding one, saidprojection preventing thereby any disturbing rotation of the shuttle andthe bobbinv about the verticz-.l axis passing through the center ofvgi-avity of the bobbi.

2. In a braiding machine, in combination with a guide plate providedwith grooves. of bobbiir spindles, shuttles connected to said spindlesandprovided near their upper portion with a projection, and means torcausing said bobbin spindles to travel in the grooves of the guideplate, the grooves of said guide plate comprising two stages, the lowerone of which having arc shaped lateral walls serves for receiving theshuttles having also anc shaped walls, while the upper stage serves iorreceiving the projection provided on the shuttle acting as a support forthe latter when the bobbin spindle passes from one groove into thesucceeding one and preventing thereby a disturbing rotation ot theshuttle and the bobbin about the vertical axis passing through thecenter of gravity of the bobbin.

3. In a braiding machine, in combination with a guide plate providedwith grooves, of bobbin spindles, shuttles connected to said spindlesand provided near their upper portion with a projection, and means forcausing said bobbin spindles to travel in the grooves of the guideplate, the grooves of said guide plate comprising two stages, the lowerone of which having arc shaped lateral walls serves for receiving theshuttles having also are shaped walls, while the upper stage serves forreceiving the projection provided on the shuttle acting as a. supportfor the latter when the bobbin spindle passes from one groove into thesucceeding one, the height of the upper stage of the groovescorresponding` to the height of the projection and the total height ofboth stages corresponding approximately to the height of the shuttle.

4. In a braiding machine, in combination with a guide plate providedwith grooves, of bobbin spindles, shuttles connected to said spindlesand provided near their upper portion with a projection, and means forcausing said bobbin spindles to travel in the grooves of the guideplate, the grooves of said guide plate comprising two stages, the lowerone of which having arc shaped lateral walls'serves for receiving theshuttles having also arc shaped walls,while the up per stage having atthe end of the grooves a straight portion serves for receiving theprojection provided on the shuttle acting as a support for the latterwhen the bobbin spindle passes from one groove into the succeeding one,said projection having straight lateral walls being guided by saidstraight wall portion at the end of the stages so as to direct theshuttle passing out of a groove into the next one.

5. In a braiding machine, in combination with a guide plate providedwith grooves, of an angular guide member inserted into the guide plateat the end of two adjacent grooves of said plate and having two4straight lateral walls, bobbin spindles, shuttles connected to saidspindles and provided near their upper portion with a projection havingstraight lateral walls, and means for causing said bobbin spindles totravel in the grooves of the guide plate, the grooves of said guideplate comprising two stages` the lower one of which having are shapedlateral walls serves for receiving the shuttles having also arc shapedwalls, while the upper stage having at the end of the grooves a straightportion serves for receiving the projection provided on the shuttleacting as a support for the latter when the bobbin spindle passes fromone groove into the succeeding one, said projection being guided whenpassing with its straight lateral walls past said straight wall portionat the end of the stages so as to direct the shuttle passing out of agroove into the next one, and the height of said angular guide member 4being at least equal to the height of the projection and said straightlateral walls of the guide member constituting the rectilinear ends ofthe outer wall of the upper stage of the grooves.

6. In a braiding machine, in combination with a guide plate providedwith grooves, of an angular guide member inserted into the guide plateat the end of twoadjacent grooves of said plate and having two straightlateral walls, bobbin spindles, shuttles connected to said spindles andprovided near their upper portion with a projection having straightlateral walls, and means for causing said bobbin spindles to travel inthe grooves of the guide plate, the grooves of said guide platecomprising two stages, the lower one of which having arc shaped lateralwalls serves for receiving the shuttles having also arc shaped walls,while the upper stage having at the end of the grooves a straightportion serves for receiving the projection provided on the shuttleacting as a support for the latter when the bobbin vspindles pass fromone groove into the following one, said projection being guided whenpassing with its straight lateral walls past said straight wall portionat the end of the stages so as to direct the shuttle passing out of agroove into the next one, said straight lateral walls of the guidemember constituting the rectilinear ends of the outer walls of the upperstage of the grooves and having the same direc-tion as the tangenttouching the are of a circle of the outer wall oi"` the lower stage ofthe appertaining groove at the point where said groove ceases.

In testimonv that I claim the foregoing as my invention, I have signedmy name.

ERWIN IALTER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, JJ. G.

